33.
A) Express the concentration of an aqueous solution of glycerol C3H8O3 in weight percent if it freezes at a temperature of -0.52 ° C.
B) Methyl alcohol and benzene form an azeotropic mixture containing 39% methanol and 61% benzene, which boils at a temperature of 57.9 °C. The boiling points of methanol and benzene are 64.7°C and 80.2°C, respectively. What will be collected in the receiver and what will remain in the distillation flask during fractional distillation of a mixture consisting of 20% methanol and 80% benzene.

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